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Patented Oct. 22, 1918.

2 SHEETS SHEET 2.

, V V I L Ammwmvs EMIL S. LEMME, OF SAN FRANCISCO, CALIFGBNIA.

INTEBLOCKING BUILDING-BLOCK.

Specification of Letters Patent,

Patented Oct. 22, 1918.

Application filed March 20, 1917. Serial No. 155,967.

To all whom it may concern: 7

Be it known that I, EMIL S. LEMME, a citizen of the United States,residing at the city and county of San Francisco and State ofCalifornia, have invented new and useful Improvements in InterlockingBuildin Blocks, of which the following is a specification.

My invention relates to the construction of building blocks or bricks ofthat class which is formed of plastic material molded in the desiredshape and made hollow, with connecting interior passages forventilation.

It consists in the molding of hollow blocks with transverse ribs, havingsegnrentaifhori zontal channels adapted to register to form circularopenings; and raised ribs and corresponding depressions are made uponthe meeting faces and ends, to cause the blocks to register properly andto gage and space them, for the proper amount of mortar in the joints.It also consists in forming the raised ribs of such less length than theblocks as to leave spaces through which electric wires and otherconnections may be made without perforating or damaging the blocks.

Having reference to the accompanying drawings Figure 1 is a verticalsection of the blocks in a wall.

Fig. 2 is a perspective view of a block.

Fig. 3 is a vertical section on line 33 of Fig. 4.

Fig. 4 is a vertical section on line 44 of Fig. 3.

Fig. 5 is a detail section on line 55 of Fig. 4.

Fig. 6 is a detail plan view of the interlock of contiguous blocks.

Fig. 7 is a section of the end, showing the interlock.

Fig. 8 is a corner fragment.

Fig. 9 shows the corner construction.

The blocks or bricks A are made of any suitable or conventional exteriorform, with side and end walls of suflicicnt thickness ior strength andforming vertical, rectangular interior passages a which, when the blocksare laid up to form a structure. will provide a hollow Wall with ampleventilating space and draft.

Midway between the ends, ribs 2 are formed, dividing the hollow space,and when the blocks are laid in courses to form a wall, the ribsregister with the ends of alternate blocks, so that a series of verticalair spaces or channels a will be formed throughout the walls. In orderto provide for transverse movement of the air throu h the walls, theribs and end walls of each block have semicircular channels 2 formed atthe top and bottom, and WllBILtllB blocks are laid to form a structure,the registration of the ribs and end walls brings two of theseseniicircular channels together, so that horizontal channels are formedintersecting the vertical channels, and providing for a completecirculation in all directions through the Wall.

The blocks are rapidly and accurately laid and adjusted upon each otherby forming extension flanges 3, upon one surface at the inner edges ofthe hollow walls and corresponding inter-engagin depressions 4 upon theopposite surface. T e ends of the blocks have projecting flanges 5, atone end, and depressions 6 into which the flanges fit when the blocksare laid up, and are thus correctly matched together. (See Fig. 6).

In order to gage the interspacing of the joints and the amount of mortarto be spread upon the meeting surfaces, without undue loss of time andmaterial, the projecting ribs or flanges 3 are hi hcr than the depth ofthe corresponding depressions, so that when matched together, theyContact with the bottoms of the depressions and retain the edges of theblocks apart. (See Figs. 1, 2 and In order to form passages from theexterior to the interior channels to make electrical or otherconnectionsand conduits, the ends of the flanges or ribs 3 stop short of the endsof the blocks A, so that when laid a transverse space will be formedbetween adjacent flanges at the meeting ends, as at 3*, and at thecrossing rib 2 of the block of the next succeeding course, and throughthese passages connections may be made with conductors concealed Withinthe walls. These spaces also admit the passage of air, increase thecirculation and maintain a warn: and dry condition.

The blocks may be connected in a horizontal or vertical position withoutin any way interrupting the air currents or connections, and thusarchitectural variations are pro vided for. Metal bars 7 may also beintroduccd in these channels or passages for securing nailing strips,joist anchors, reinforcing rods, etc.

It will be manfiest that a structure built of blocks of this descriptionwill be thoroughly ventilated and capable of a reinforced connectionwith the remaining structure units of the building of which the blocksform a part for the metal anchors 8 can be passed through the slots oropenings 3 from the interior to the exterior and connect with Structuraljoists or other attachments, as at 9, Fig. 1.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. A hollow interlocking building block havinglongitudinal flanges on one side terminating short of the end walls andlongitudinally spaced depressions in its opposite side of less depththan the flanges whereby the end walls of the block will be spaced fromrelatively superposed blocks, and a transverse partition wall dividingthe hollow interior of the block and extending at one end between thespaced depressions to interlockingly en age with the spaced 0 posingends of t e flanges of a relative y Copies of this patent may beobtained for subjacent pair of abuttin blocks to hold the same againstlongitudina movement.

2. A hollow interlocking building block having lon itudinal flanges onone side terminatings ort of the end walls and a depression in itsopposite side of less depth than the flanges whereby the end walls ofthe block will be spaced from relatively superposed blocks, and atransverse partition wall dividing the interior of the block andextending at one end above the end walls to lie flush with the lonitudinal flan es whereby to extend across tfle longitudina ly alinedspaces above the end walls to guard against the entrance of a conduitinto such longitudinally alined spaces, said walls being provided withregistering channels for receiving conduits.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

EMIL S. LEMME. Witnesses:

J OHN H. HERRING, W. W. HEALEY.

five cents each, by addressing the Commissioner of Patents, Washington,D. O.

